Grilled Steak with Berry Barbecue Sauce

Name: Grilled Steak with Berry Barbecue Sauce
Ingredients: 2 tablespoons extra-virgin olive oil, plus more for the grill; 1 shallot, minced; 2 cloves garlic, minced; 1 teaspoon ground cumin; 1/2 teaspoon ground coriander; 1/4 cup bourbon; 1 1/2 cups blueberries; 1 cup blackberries; 1/4 cup ketchup; 2 to 4 tablespoons packed dark brown sugar; 1 tablespoon balsamic vinegar; 1 tablespoon soy sauce; 1 chipotle chile in adobo sauce, roughly chopped; 2 sprigs fresh thyme; Kosher salt and freshly ground pepper; 1 tablespoon unsalted butter; 6 strip steaks (8 to 10 ounces each)